Yea, homeowner grade is my impression of all Briggs stuff. The Subaru engine was nice. I originally got the first generator on sale for $450 (down from $600), so the even swap credit on the $799 Briggs sounds like a good deal (on the surface). I still think the Powermate was a better generator, even though it listed for $200 less.14.50 series is not a bad engine, but its a homeowner grade engine, the Subaru was more or less commercial quality. I hope they gave you a generous credit back as the briggs is cheap compared to the Ru.
The briggs engine is VERY sensitive to Ethanol and old gas...they will not tolerate it, and the carbs are very expensive.
AFAIK, all engines are sensitive to ethanol and old gas, at least that's my experience. I have a dozen motorcycles in storage-mode, the little ones are the worst when it comes to old fuel. I keep all of my machines stored with fresh oil and a completely dry fuel system. When I pull them out, everything always starts right up even after sitting for years.